Telegraph apparatus



Sept. 28, 1943. K A, SYLVESTER v 2,330,250

TELEGRAPH APARATUs l Filed Oct., 1'7. 1941 2 Sheets-Sheet l a) l: 05 a u l In IQ:

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0 s es N INVENTOR. Q O KIMMEL A. SYLVESTER -f BY v ggg@ h.

ATTORNEY Sept. 28, 1943.

K. A. sYLyr-:sTER 2,330,250

TELEGRAPH APPARATUS 'Filed Oct- 17, 1941 2 Sheets-Sheet 2 NTOR INVE KIMMEL A.SYLVESTER.

BY. a@

ATTORNEY.

are pivotally articulated by a socket connec tion to their individual levers 28. Each of the levers 28 is provided with an arm 3| and is normally biased in a clockwise directionabout the pivot 29 by a spring 32. Arms 3| cooperate Vwith a series of helically arranged projections 33 on a selector cam drum 34, which is frictionally driven by a main operating shaft 35 located in a perpendicular position at the rear and to the rightY of the code bars I5. The main operating shaft 35 is driven continuously by a motor 36 through a pinion 31lsecu red to the motor shaft 38, which pinion meshes witha gear operativelyassociated with shaft 35, As fully described in the afore-mentioned patent, the cam drum 34 is initiatedinto rotation uponreceipt of a starting impulse which causes the defenergization of the magnet I1, thereby releasing the armature lever I8, `which then responds to the pull of spring 26 to rotate the lever I8 ina clockwise direction. Upon this.move

ment, an eccentric screw VIII cooperates with a l plunger 42 which acts inthe manner shown Vin Fig. 5 of U. S. Patent No. 1,884,743 to release, through a lever arrangement shown in Fig. 6, a stop arm (not shown) toinitiate rota-tion of cam 5 4. A 1 Y The speed of rotation of selector cam drum 34 is synchronized withthespeed of c ode impulsing so that as the armature lever-I8 is operated in response to received impulses, a cam 33 acts upon its associatedflever 2B to rock said lever 28 counterclockwise (as viewed in Fig. 3) to bring its sword 25 againstselector arm I9. Sword 25 will be rocked clockwise or counterclockwisq depending onv whether abutments 2| and 23A or 22 and'24 cooperate; for example, if abutments 2| and 23 cooperate, then the sword 25 will be swung in a counterclo'ckwise direction and will assume the position shown in Fig. 3. On the other hand, if abutments 22 and `24 cooperate then vsword 25 will b e swung ina clockwise direction to assume theopposite position.A After the s word 25 h as been set in accordance Ywith rthe nature ofthe signal impulse and the cam 33 passes` out of op-V erativeengagement with arm 3|, the lever v2 8 will beactuated in a clockwise directionby its spring 32, carrying Vits associated sword 25 along with it to impinge the sword A25 against the arms of a T-lever 45 pivoted at 46, thusrocking the bars 5 as the striker bar or operating bail 52 (Fig. 2) is raised and lowered. The bail 452 is operated by a cam (not shown) on the main shaft 35 in a manner described in Patent No. 1,745,633. When the bail 52 is in its lowermost position, it cooperates with the beveled edges 53 of the bars I4 and 49 to hold such bars out of engagement lwith the code'bars I6.so that the codebars I6 may be readily shifted in accordance with the operation of the selector mecha nism. When the bail 52 is o-perated upwardly to perform a printing operation the bars I4 and 49, due to the beveled edges 53, are permitted gradu- -ally to be actuated toward the code bars I6 by their individual springs 54. The actuating bars I4 are provided with a hook portion 55 which c0- operates with the bail 52 which in its upward movement engages the hook 55 to lift the actuating bar I4, so that through the rack and pinion connection ,between the actuating bar Vand the type bar, the type bar is caused to.rotate about its pivot to bring the type face downwardly to impinge upon the platen II. The locking bar 49 is not provided with a hook portion 55, since its function is to rock on its pivot toward and away from thev code bars I6 under the control of the bail 52 to lock the code bars IB in theirr set position during the printing operation. According to the present invention, the locking bar -4 9 while held in its position away from the code bars I6 when the bail 52 is in its lowermost position, cooperates with a series of bell cranks 576 tohold said bell cranks Vin their counterclockwise position, Bell cranks 56 are pro- Videdwith shouldered portions 51 through the instrumentality of which rotation of the bell cranks 56 to their clockwise position is permitted or prevented by code bars I6. That is, if any of the code bars I5 is set in the position indi- T-lever 45 in a clockwise or counterclockwise direction. Each of the T -levers 4 5 is pivotally articulated to a code bar I6 so, that when a T- lever 45 is actuated in a clockwise or counterclockwise direction, its `associated code bar is set correspondingly. Accordingly. with the selecting mechanism just described,the code bars,|5 are set selectively in ,their rightward orY leftward po sitions (Fig. 1) in responseto the'impulses of a code signal. 1

As described in Patent ting of the code bars I6 is maintained duringvthe printing operation by a detent or locking means. Accordingly, a locking bar 4 9 (Fig. 3) is provided which .cooperates with beveled notches 5| on code bars I6. B ar 49 is vpiv'otallymounted vand v'is moved into and out of engagement with the code' No-. 12745633. 'the et? cated in Fig 3, and the locking -bar is permitted to enter the V-notch, the bell crankV 56 associated therewith is blocked through the Aimpingement of shoulder 51 with the end, of the associated code bar I6. On the other hand, if a code bar I6 assumes itsE opposite or rightward position as viewed in Fig. 3, the bell crank 56 .associated therewith would not be blocked, but would rotate clockwise lin response to spring tension and follow lthe movementof locking bar v49. There is provided a .bell crank 5Brfor each of the code bars I6; Also cooperating with the bell cranks 56 -is* ar series of levers 58, 6|, and 65 which govern the positionment of a corresponding se` ries of punchinterponents 68 (Fig. 1

Adjacent to the platen I| is a punch block 1| carrying a plurality of punches which are controlled permutably bythe interponents 68, which areslidably arranged in a cradle 69 pivoted at 12.` Cradle 69 is connectedby a link 13 Ato a per* forator operating lever 14. The operating lever 14 is pivotally mounted on a pivot rod 15 sup-` ported in bearings 16 and 1.1. viewed in Fig. 2, the operating lever 14 is provided with an extension- 18 whichcooperates with an operating cam 19 (mounted on shaft 35) through the instrumentali tyjof a'follower roller 8| carried at the end of arm18. A spring. (not'shown) acts upon lever 14" tohold the cam follower roller 8| against the periphery of the cam 19.

The recordmaterial, after being perforated in the punchblock 1I, passes over a tape feed roller 82 which is provided with a series of spaced feed pinsor projections 83' adapted. to cooperate with the feed holes formed inthe record strip or material by the feed punch ofthe punch block 1|.

The feed roller 82 is provided with a series 'of tooth-shaped grooves 84 which cooperate with a tape feed pawl 85 pivotally' carried on thecradle 69 in well-known manner. Now, uponeach cycle of rotation of cam 19, the lever 14 is reciprocated so as to operate, through link-13, the cradle 69, whereupon the end of the cradle underneath the punch block 1 I, as viewed in Fig. 1, is raised and lowered to operate the punches through the instrumentality of the interponents 6K8' which have been set permutably by the code bars 1'6 through the instrumentality' ofv levers- 56, 58, 6| and 6'5. As the cradle 69 is thus operated, the pawl 85 is raised into engagement with a'succeeding tooth in the feed roller 82 and thereupon, in response to the downward movement of the cradle 68, the feed roller 82 will be rotated one step, and lhence through the sprocket teeth 83 the record strip inserted` therein will be stepped or advanced one unit distance.

According tothe principal feature of the present invention, it is the purpose of the arrangement herein disclosed to cause the tape feeding mechanism just described to be operated successively a plurality of times so as to feed out a sucient amount of record material to insure that the last code combination perforated in the tape will be presented to the sensing pins in the tape transmitter. To this end the worm and follower timing device of the present invention is provided.

Having reference to Fig. 3, one of the cam projections 33 on the cam drum 34, as set forth in said aforementioned patent, is utilized toV initiate the operation of the main operating cam sleeve 86 (Fig.2) carried on the main shaft 35. As viewed in Fig. 3, the cam projection 33 is shown in cooperative relationwith an arm 81 of a @clutch throwout lever 38 pivoted on a shaft 88 journalled in brackets 9| and 92 (Fig. 2). Clutch throwout lever 88 is normally biased in a clockwise direction (viewed in Fig. 3) by a biasing spring 93. Lever 38 is provided at its lower end with an arm 94 having aA laterally disposed extremity 95 which cooperates with a flange 91 on the driven portion of a clutch 96. As is well known with this type of clutch 6, the lateral portion 95 acts upon the flange 91 to cam the driven portion out of engagement with the driving portion, so that when the cam 33 acts in its rotative path to operate arm 81 of lever 8S counterclockwise against the action 0f spring 93, the clutch lever 88 is thus rotated to impart similar rotation to arm 94 to move the lateral'portion 95 out of engagement with the stop portion on ange 91 to permit the compression spring 98 to urge the driven portion 91 into engagement or meshing relation with the driving portion of the clutch 38, thus causing thesleeve 86 to rotate. In this manner, the cam sleeve 86 is caused to rotate, and its cam 19 acts through follower roller 8| to operate perforator operating lever 18, in the manner previously described, to eifect a perforating operation. Cam sleeve 86 also carries a cam 99 which cooperates with a cam follower roller I0 I j carried at the extremity lof one arm of a lever |02 pivoted at 183 to projection loll of a bracket |05. The opposite arm of lever 102 is provided with a downwardly projecting portion |06 on which is pivotally mounted a paWl member |01. A spring |08 is distended between a projection on pawl |01 and a projection on portion |06 to bias the pawl |01 normally in a clockwise direction (as viewed in Fig. 4) into cooperative relation with a ratchet wheel: |09 integral asleeve member t1 rotatably inormtecron a (Fig. 2) of bracket-or' mounting |05. Sleevey HI is; also provided with an. integral screw .portion Cooperabiy related with the threads of the screw I15is la! follower pin 11's rriounte'dY on the eritrernity of a screw follower lever V|v |1. Follow'er lever` y|11 is pivotaliyf mounted at I Itv te aportion H9 rotatably mounted on a p'Vf; shaft I2( also journalled inthe bracket member |05. Portion I I8 is' provided with an arm |22 which cooperates with the A*bent arm |23fofanar-mature lever" |24 pivoted at |25. A spring 123 is distended between arm |23 andarm |22 so' as to bias amature lever |24 and lever H8 attrahentl'y. -When' the fol-'- lower pin I6 is not-in ,engagement with the vscrew H5, then the lever I |1 is biased in its counter'- clockwise position (as viewed in Fig. 3) against an adjustable stop |21.

The movement or rocking of the armature lever |24 is' governed by a magnet`|28 and a spring `I 219'. The spring |26 does not act to rotate the armaf ture lever |24 but merely serves to hold arm |22 ofr'nember 1'19'into engagementwith arm |23; that is, spring |26 governs therotation of member |19' and its follower arm I I1. When the'magnet |28 istie-energized, the spring |20 acts to rotate armature lever |24vr to bring its arm |31 into contact with a stop pin |32. The armatureY lever 124 is provided withjan extension |33 which cooperates with a bank of contacts 134, comprising three contacts |35, 36, and |31.

The'norrnal condition of the apparatus is such that when-the Vrfnagnet |28 is energized its armature lever |24 will actrthrough arm |23 and arm |22 to hold, the follower lever ||1 in its' clockwise position-(as viewed inlig. 4)' tohold the follower pin I |6 out of vengagement with the screw |15. Then, when the magnet |28 .s deener'gized and its: armature is released under the pull of* spring I 29 and caused to rotate in a clockwise' direction'so that spring |26' will rotate the follower lever ||1 in' a counterclockwise direction to bring the follower pin IIS into engagement with the screw II5, the screw 5 as it is rotated, as will presently appear, will cause pinlhi to travel along the screw ||5 from righ-t to left (as viewed in Fig'. 2), until it encounters a;l pair ofy contacts |38 which are causedto ybe closed upon further movement of the pin ||6 along said screwy ||5 in a leftwardr direction.`

The'tape feeding-out arrangement according to the present invention comprises also an auxiliary magnet |41 which is appropriately mounted inthe selector mechanism bracket to cooperate with an armature lever |12 pivoted at' |13 (Fig. '3). Lever' |13 isprovided with an extremity |14 (Fig. 6) which cooperates with the vertical arm of a bell crank |15, in the same manneras does the lp lunger 42, to operate said bell crankjl15 oounterclockwise (as viewed in Fig. 6) to cause the stop gate latch 116 to be rocked clockwise to free the stop gate |11 for rotation in respons'eto pressure exerted by astop arm (not shown) cara ried on the cam rdrum `31|. Thus, it is se'erifthat when the magnet |4| becomes energized, as will presently appear from the following description of operation and of the description Sof the circuit shown inwFig. 5, its armature lever. |12 will be rocked clockwise (as viewed in Fig. 3) to cause its end or-extremity |14 (Fig. 6) to rock thev bell l crank lever |15 and to hold or maintain it in its rocked or ,counter-'clockwise .position long as' the magnet |4| remains energized. In response tothis condition the stop gate latch |16 is held disengaged and permits continuous rotation of the cam drum 34, so that upon each rotation of the cam drum 34 the cam 33 will act uponthe clutch release or throwout lever l'88. When the clutch throwout arm er lever 88 is thus operated for each revolution of the cam drum 34, the sleeve 86 is accordingly released for rotation and isrotated continuously as long as the magnet |4| remains energized. This causes constant oscillation or reciprocation of the lever |02 so that the pawl |01 continuously reciprocates back and forth to rotate the ratchet wheel |09, and hence turn the screw ||5 continuously. Then, if the pin H6 is in engagement with the screw threads of |,|5, the lever |1 will be rotated clockwise (as viewed kin Fig. 3) until it reaches the contact `|38-whereupon said contact will be closed, the effect of which will appear hereinafter.

In the circuit shown in Fig. 5, the key designated |42 is located in the local printing apparatus, and the key designated |43 is located remotely of the printingv apparatus. In the normal condition of reception `of code signals the circuit is conditioned as shown in Fig. 5 with the contacts |44 and |45 (associated-with keys |42 and |43, respectively) closed. In this condition a circuit is completed from negative battery through contacts |45 and |44, then through contact |36 and through the winding of magnet |28 to positive battery, thereby holding magnet |28 energized, since it has been previously energized over a circuit which will hereinafter be described. When either one of the contacts |44 or |45 is opened momentarily by its keys |42 and |43, respectively, the circuit for the magnet |28 is opened. and the magnet |28 is thus de-energized permitting its armature |24 to be pulled rightwardly as viewed in Fig. 5 to close a contact |31. Now when the key |42 or |43 has been released to'close its respective contact, a circuit will be completed from negative battery through contacts |45 and |44, over armature |24 and through contact |31 (now closed), then through magnet |4| to positive battery. The magnet |4| now becomes energized and in so doing it attracts its armature lever |12 (Fig. 3) to operate, through end |14 (Fig. 6), the bell crank lever |15 and stop gate latch |16 to initiate the rotation of cam drum 34. The de-enegization of magnet |28 has in the manner previously described caused the follower pin |6 to be brought into cooperative engagement with the screw H5.

The constant rotation of the cam drum 34,

and of course the earn sleeve 86 has, through the cam 99 and lever |92, caused theV pawl |01 to operate the ratchet wheel |99 continuously so as to impart continuous rotation to the screw I5. In this manner, the follower pin I6 travels across the length of the screw 5 toward the contact 38. As a result of the de-energization of magnet 28 the contact |35 was closed. Therefore, when the follower lever ||1 has been operated to the point where it closes the contact |38, a circuit for re-energizing the magnet |28 will' be completed from negative source of battery, through contact |45, `over conductor |46 and through resistance |41, then through contact |38 (now closed), over conductor |48, through contact |35 (now closed), and through the winding of magnet |28 to positive source of battery. The energization of magnet |28, in this manner, attracts its armature |24 to open the contact |31 and close the contact |36, as Well as open the contact |35 thereof. The opening of contact |31 causes the de-energization of magnet |4| due to the breaking of its energizing circuit at contact |31. The closing of contact |36 completes a locking circuit, as previously described, for the magnet |28 from negative source of battery, through contacts |45 and |44, over armature |24, through contact |36 (now closed) and through the winding of magnet |28 to positive source of battery. The opening of contactI |35 occurs after the closing of contact |35 because the contacts |36 and |35 form a make before break contact arrangement, thereby insuring the locking up of the relay magnet |28. The energization of magnet |28 causes; 4through its armature lever |24, the contact |38 to be opened, because the lever ||1 is actuated to withdraw the pin i6 from the screw H5, thereby permitting the lever ||1 to respond to its spring to be returned against the stop |21 in preparation for another timing operation.

Provision is made in the circuit arrangement shown in Fig. 5 whereby the automatic feeding out of the tape may be interrupted upon the resumption of signal reception; that is, in response to the first spacing signal received which is the start signal.Y With this arrangement the inagnet |28 is connected electrically with a line relay i 5| having a line winding |52 and a biasing winding |53. Line relay |5| also has an armature |54 which is oscillated back and forth in response to line signal impulses between marking and spacing contacts |55 and |56, respectively. Thus, after the cessation of reception of signal impulses, and during the period of spacing out of the tape upon the operation of a key |42 or |43, if a spacing signal is received by the line relay |5|, its armature |54 is swung over to the spacing side to close the spacing contact |55, thereby completing a circuit for reenergizing the magnet |28 from negative source of battery through resistance |51, then over armature |54 and through contact |55 of the line relay |5|, then over conductor |58, throughcontact |59 of a control magnet |5| (the function of which will be hereinafter described), then over armature |62 and conductorll, through Contact 235 (now closed, due to the fact that magnet |28 has been cle-energized to perform the tape spacing operation), then through the winding of magnet |28 to positive battery, thus causing the re-energization of magnet |28 and the withdrawal of the tape follower pin i 6 from the screw i5, permitting the return of thetape follower lever ||1 to its stop' position against the stop |21.

It sometimes becomes desirable to cut or switch out one or moreV of the printers in a connected series of printers in the signaling line from a remote station, such as a central station. In this connection, it is also desirable to keep or maintain the selector magnets or line relays at each station energized or continued in the line circuit. With the arrangement according to the present invention it is possible for a remote station to switch out a local station Without disturbing the energization of the selector magnet l1 so that in the event the switched-out station has just completed a message and the tape out switch has been operated, the feeding out of the tape in response thereto will not be interrupted, so that the resumption of message reception by other stations will not interfere with the tape-out operation at the switched-out station. In Fig. 5, therefore, the magnet |6| is shown with one terminal of its winding connected by a conductor |64 to the point |65 of the armature |54 of the mecl-i'anism,.the` operation offsaid recording de-V line relay I I Il'. V Thus, when the key VI S1 at the remote station is operated, a. circuit iscompleted for magnet Iii-I from'negative battery, through resistance i. 155|,

through point 165 and over .connector-#1641,'

through" the Winding of magnetl .IzlIlzthence through the Akey contact i161 at the :central station, thence yover conductor .P66 `and throughfthe' winding of the selector magnet I1 to positive .battery. This circuit holds the magnet ISI and sclector magnet I1 energized. In this manner the selector magnet Il is nonresponsive to the eiect of the line signals upon the line relay I5 I, so that when the armature ISIS vibrates in response to the marking and spacing signal impulses through the coil |52, the magnet I'I will remain energized over the previously described circuit. Moreover, since the magnet ISI is energized its armature I62 is attracted, thereby opening the contact |59. Then, if the tape-out mechanism controlled by the magnet I28 is in operation, it cannot be interrupted by the closing of Contact |56 at the line relay in response to spacing signals as described hereinbefore because of the fact that the Contact |59 is still open. Hence, according to the foregoing description, the tape-out mechanism at a particular station identified by the key IE'I at the central station may be cut out of the line without cutting-out or breaking the signal line. The effect is then to render only a remote station printing mechanism ineffective or nonresponsive to line signals Without disturbing the tape feed-out mechanism thereat;

Although a specific embodiment of the invention has been disclosed herein, it is understood that many changes may be made without departing from the spirit and scope of the invention as defined in the appended claims.

What is claimed is:

1. In combination, a selector mechanism, a recording device, primary means responsive to line signals for controlling, through said selector mechanism, the operation of said recording device, secondary means for controlling through said selector mechanism said recording device, a timing device effective under the control of a normally energized magnet for controlling, through said secondary means, the operation of said recording device for a predetermined period, means under the control of the line signals for interrupting the operation of said timing device, and means for rendering said interrupting means ineffective to interrupt said timing device.

2. In combination, a selector mechanism, a recording device, an electromagnetic device responsive to line signals for controlling, through said selector mechanism, the operation of said recording device, a second electromagnetic device for controlling through said selector mechanism said recording device, a screw and follower timing device controlled by a normally energized electromagnet for governing, through said second electromagnetic device, the operation of said recording for a predetermined period, means under the control of the line signals for interrupting the operation of said timing device, and means for rendering said interrupting means ineffective to interrupt said timing device.

3. In combination, a selector mechanism, a recording device, primary means responsive to line signals for controlling, through said selector Furthermore, the portion .of the.A conductor between the contact 1:55 4and thefse`.,

.vice, secondary means for controlling through said selector-mechanism saidfrecordng device', a timing -device effective under the control of .a normally energized. magnet for controlling,

through said ysecondary means,- the operation *of* said recording devi-ce for aV predeterminedfperiod, meansv under the v.control of the r line signals for interrupting .the operation of saidv timing device, andmeans for rendering said :interrupting means ineffective, said meansincluding short circuiting means for said primary mean to prevent itsresponsetoline signals.`

v,4. In combination-a kselecting means', Tai re-v cording means, signal responsive means to control, through said selecting means,.said recording means, auxiliary means also eiective through said selecting means to control said recording means, delay mechanism effective under the control of a normally energized magnet for controlling, through said auxiliary means, the operation of said recording means for a predetermined period, means under the control of the line signals for interrupting the operation of said delay mechanism, and means for rendering said interrupting means ineffective to interrupt said timing, device.

5. In a tape perforator, a perforating mechanism, tape advancing means,la selecting mechanism responsive to code signals for controlling said perforating mechanism, means for operating said tape advancing means once for each code signal applied to said selecting mechanism, signal responsive means effective through said selecting mechanism for controlling said tape advancing means, and means effective under the control of a normally energized electromagnet for controlling, through said selecting mechanism, the continuous operation of said tape advancing means for a predetermined period.

6. In a tape perforator, a perforating mechanism, tape advancing means, a selecting mechanism responsive to code signals for controllingv said kperforating mechanism, means for operating said tape advancing means once for each code signal applied to said selecting mechanism,

signal responsive means effective through said` ling` through said selecting mechanism, the continuous operation of said tape advancing means for a predetermined period, and means under the control of the line signals for interrupting the operation of said last recited means.

7. In a tape perforator, a perforating mechanism, tape advancing means, a selecting mechanism responsive to code signals for controlling said perforating mechanism, means for operating said tape advancing means once for each code signal applied to said selecting mechanism, signal responsive means effective through said selecting mechanism for controlling said tape advancing means, timing means effective under` thel control of a normally energized electromagnet for controlling, through said selecting vmechanism, the continuous operation of said tape advancing means for a predetermined period, means under the control of the line signals for interrupting the operation of said timing means, and means for rendering said interrupting means ineiective to interrupt said timing means.

8. In combination, a selector mechanism, a recording device, means responsive to code signals for controlling through said selector mechanism said recording device, auxiliary means manually controlled and operable through said selector mechanism for also controlling said recording device, means responsive to said manually controlled means for timing its effective control, means under the control of code signals for interrupting the operation o1 said timing device, and means for rendering said interrupting means neiective to interrupt said timing means.

9. In a. telegraph system, a relay responsive to 1u line signals, means controlled by said relay to control selective operations, an auxiliary elec` tromagnet, an electromagnetic means also controlled by said relay to control said auxiliary electromagnet, manually operative contact means effective initially to cause the de-energization of said electromagnetic means whereby an energizing circuit is prepared for said auxiliary electromagnet and Subsequently to establish an energizing circuit for said auxiliary electromagnet, circuit means under the control of said relay for interrupting the operation of said electromagnetic means, and circuit means for rendering said circuit interrupting means ineffective by establishing a short circuit for said relay controlled means to prevent its response to line signals.

KIMMEL A. SYLVESTER 

